<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        body{
            margin:0;
            padding:0;
            width:100%;
            height:100%;
            min-height:100%;
        }
        #container{
            position:relative;
            width:80%;
            margin:0 auto;
            min-height: 800px;
            border:1px solid red;
        }
        .is-Transformed {
            background:#ccc;
            width: 50%;
            margin: auto;
            position: absolute;
            top: 50%; left: 50%;
            -webkit-transform: translate(-50%,-50%);
            -ms-transform: translate(-50%,-50%);
            transform: translate(-50%,-50%);
        }
    </style>
</head>
<body>
<div id="container">
    <div class="is-Transformed">
        <div>fdsafdsafdsafdsafdsafdsafdsafdsafdsafdsafdsafdsafdsafdsa
            fdsafdsafdsafdsafdsafdsafdsafdsa</div>
    </div>
</div>
</body>
</html>